Linux kernel 4.4 LTS (Long-Term Support) was officially released by Linus Torvalds and his team of developers on 10 January.
The new release means , the much more new features and bug fixes. And also Linux Kernel 4.4 is an LTS(Long Term Support) version and more stable release.
Now , Here I am going to show how to install Linux kernel 4.4 rc4 in Ubuntu and Ubuntu based systems using official ppa. it is official ppa of Ubuntu kernel ,so we will get updates from Ubuntu.